SHANGHAI — China, the largest foreign holder of United States debt, said Saturday that Washington needed to “cure its addiction to debts” and “live within its means,” just hours after the rating agency Standard & Poor’s downgraded America’s long-term debt. The harshly worded commentary, which was released by China’s official Xinhua news agency, was Beijing’s latest effort to express its displeasure with Washington. (snip) “The U.S. government has to come to terms with the painful fact that the good old days when it could just borrow its way out of messes of its own making are finally gone,” read the...